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Q.
For $H_{3}PO_{3}$ and $H_{3}PO_{4}$ correct choice is
NTA AbhyasNTA Abhyas 2022
Solution:
In the oxyacid structure of phosphorous above, the $P-H$ bond is responsible for reducing properties and $-OH$ groups bonded to phosphorous are responsible for the basicity of the phosphorous oxyacids.
As $H_3PO_4$ has one $P-H$ bond and $2 P-OH$ bonds it can act as a reducing agent and is a dibasic and.
